Reconstructed data represented in RowData structure. The structure will copy the structure of the RowData input
with the exception of categorical values. Categorical fields will be represented as a map of the domain values
to the reconstructed values.
Example: input RowData([sex: "Male", ..]) will produce output RowData([sex: [Male: 0.9, Female: 0.1], ..]
public double mse
Reconstruction mean squared error calculated from original and reconstructed data.
Uses a normalization defined for the numerical features of the trained model.
average reconstruction error = ||original - reconstructed||^2 / length(original)